Dayan Lopian zt”l used to say – “It is easier to be machmir than it is to know what you are talking about”, vdo”k.
The Chazon Ish would say over a story about a guy who walked around with glasses that had no lenses. When people would question him, he would say “Well, it can’t hurt.” He was right, it couldn’t hurt. But it didnt help a stitch either. The Chazon Ish said this about many Chumros.